Have a Kindle? Amazon will now loan you free books, as long as you're a Prime member. Add in the free shipping and video streaming and you've got a really compelling reason to join Amazon Prime.

The new Lending Library turns your Kindle into a sort of virtual library, with currently 5,000 titles you can borrow from Amazon, including 100 New York Times bestsellers. You can borrow one book a month by going to the "Kindle Owners' Lending Library" in the Kindle Store on your Kindle device. Books with the Prime icon can be borrowed for free for the month (as long as you're a Prime member). Correction: There are no due dates, but you can only have one book out at a time.

Even if you don't fall into one of those groups and have to pay the $79 membership,
as Gizmodo notes, Amazon Prime is still the greatest deal in tech. It's no longer about just shipping, but unlimited video streaming and now books.